Valve for steam-engines



'steam chest and valve seat.

UNITED sTATEs PATENT oEEIoE.v

ISAAC VAN DOREN, AOF SOMERVILLE, NEV JERSEY.

VALVE non STEAM-ENGINES.

Specication of Letters Patent No. 19,594, dafed'lVIarch 9, 18158.

To all whom t may concern Be it known that I, IsAAo VAN DoREN, of Somerville, Somerset county, and State of New Jersey, have invented a new and Improved YValve for Steam-Engines, which, from its form, I call a double cone or cylindrical valve, and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, and making a part of this specification.

Figure l, is an end perspective view of the steam chest and valve seat. Fig. 2, is a like view of the valve which rests between the Fig. 3, is a sectional view of the whole, in position, and through one of the steam passages. Fig. 4 is a sectional view of the same through the escape.

Hollow valves, as heretofore generally constructed, have been open to the objection that the pressure of the steam within and upon them interfered more or less with their proper motions, and increased their friction and wear.

My invention consists in so constructing a hollow valve, and arranging it in respect to the steam chest within it, that the pressure of the steam shall not interfere, to any appreciable extent, with the free and desired action of the valve, the steam chest and valve seat being usually a continuous or single piece or part.

In the drawings A, represents the steam chest, and connected with it, or an extended part of it is the circular case or frame B, which, with the steam chest A, forms a seat for the double conical valve C, which sets over the steam chest A, and within the case B.

Fig. l, is an end View of Fig. 3, from above, upon the top, A1, of the steam chest, and case B, the valve C, being removed: and Fig. 2, is an end view of Fig. 4, from below, of the valve C, the steam chest and part B, being removed.

The top A1, of the steam chest is solid with the sides, and is strong enough to resist all proper pressure, and in the sides are the two steam passages or parts D, and E," there being also through. the outer case B, two corresponding passages, F, and G, on

the same radii with D, and E, which connect with the cylinders and pistons.

H, is the escape part. The valve C, is a double cone or cylinder,

the interior space between the two sides l, and 2, being hollow, and forming a single continuous chamber, except that the steam passage I, passes entirely from side to side, interrupting the continuity of the hollow chamber between its sides 1, and 2, as seen mo-re plainly in Fig. 8. The motion of the valve C, is to carry the steam passages, from D, to E, and back again.

K, K1, K2, K3, are openings through the outer shell of the valve C, to allow the free escape of the steam through H.

The steam chest and valve seat are stationary, and motion is given to the valve C, in any of the usual ways.

As will be at once apparent from the foregoing description, the pressure of the steam is not against the valve C, and does not interfere with its proper and necessary motions, as the steam chest, through acting as a central support of the valve, is complete within itself, and receives the pressure of the steam.

When the valve C, is in the position shown in Fig. 3, that is so that the steam passes from the steam chest through D, J, and F, into one end of the cylinder, the part G, becomes an exhaust of the other end of such cylinder, the ports F, and G, in the outer case B, thus being alternately steam and exhaust ports, as the valve is worked.

The form of the several ports is, as represented, conical, to a greater or less extent, for greater convenience to render them steam tight, as they may be worn by use, but they may be made circular or cylindrical, without interfering with the principle of their action.

The valve C, is kept in its proper position in respect to the steam chest and valve seat, by a cap, setting down over the top, and bolted to the part B.

What I claim as my invention and desire to secure by Letters Patent is-- A valve, constructed substantially as above described, having the steamv chest in its center, but such steam chest so constructed, as described, thatthe steam shall not press against the valve, and also having the exhaust chamber between its outer and inner shells, the whole arranged substantially as and for the purposes set forth.

ISAAC VAN DOREN.

In presence of- J. V. D. -KELLEY, S. D. LAW. 

